A multi-zone conflicting female contact and fixed termination electrical connector
By combining the sleeve and socket spring design of the multi-area contact female contact with the limiting structure of the fixed end electrical connector, the problems of poor contact and shortened life of the female contact under vibration and shock conditions are solved, and a highly reliable and stable electrical connection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GOLDENCONN ELECTRONICS TECH CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-24
AI Technical Summary
The existing single elastic contact structure of female contacts is prone to poor contact, local stress concentration and shortened service life under vibration and impact conditions, and it is difficult to adapt to the slight deflection and radial runout of male contacts.
The device employs a multi-area contact female component, and through the combination design of sleeve and socket spring sleeve, the first elastic contact part deforms before the second elastic contact part, forming a combination of surface contact and line-to-surface contact. Combined with the limiting structure of the fixed-end electrical connector, it ensures stable insertion of the male contact and electrical connection.
It improves contact reliability, reduces the risk of poor contact, extends service life, adapts to the dimensional tolerances of the male contact and the stability of electrical connections under complex operating conditions, and meets the requirements of high reliability applications.
Smart Images
Figure CN224554775U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical connector manufacturing technology, and in particular to a multi-area contact female contact and a fixed-end electrical connector. Background Technology
[0002] As a key component in circuit connections, the structural design of electrical connectors directly affects connection reliability, conductivity, and service life. In the mating of female and male contacts, contact stability and current carrying capacity are core indicators, especially under complex operating conditions such as vibration and shock.
[0003] Currently, in the industry, female contacts typically use a single elastic contact structure to mate with male contacts. For example, some female contacts achieve contact through circumferentially distributed elastic arms, which deform radially and form surface contact when the male contact is inserted. However, this type of single contact structure has the following limitations:
[0004] 1) The contact points of a single elastic arm structure are concentrated in the same axial plane. If the male contact has a slight deviation or radial runout, it is easy for some contact points to detach, affecting the contact reliability. In turn, when transmitting high current, the temperature rise may be too high due to excessive contact resistance.
[0005] 2) During the insertion of the male contact, a single contact structure must bear all radial compressive forces at the same time. If the elastic deformation design is not reasonable, local stress concentration is likely to occur, leading to elastic fatigue and shortening the service life.
[0006] 3) When there is a slight deviation in the insertion depth of the male contact, the single contact structure may not be able to adapt due to the fixed contact position, resulting in poor contact.
[0007] To address these issues, some manufacturers have attempted to increase the number of contact points, but most adopt an axially aligned distribution method, which still cannot avoid the limitations caused by the concentration of contact points. Other designs arrange the contact parts in an axially staggered manner, but do not differentiate the deformation sequence and contact method of different contact parts, resulting in limited improvement in contact stability. Utility Model Content
[0008] The purpose of this invention is to provide a multi-area contactor that aims to improve the stability and conductivity of the contact with the male contact by optimizing the distribution, deformation sequence and contact form of the elastic contact structure, so as to meet the application requirements of high reliability and high current transmission scenarios.
[0009] This utility model relates to a multi-regional contact female component, which is composed of a sleeve and a spring sleeve for insertion, wherein the sleeve is used to constrain the radial expansion freedom of the spring sleeve. The spring sleeve has a cylindrical structure and is integrally formed with a first elastic contact portion and a second elastic contact portion that are staggered along the axial direction. During the insertion of the male contact, the first elastic contact portion undergoes radial elastic deformation before the second elastic contact portion, and the first elastic contact portion abuts against the male contact through surface contact, while the second elastic contact portion abuts against the male contact through line-surface contact.
[0010] As a further improvement to the technical solution disclosed in this utility model, the first elastic contact portion is composed of a plurality of elastic arms circumferentially distributed along the central axis of the socket spring sleeve. One end of the elastic arm is integrally connected to the circumferential sidewall of the socket spring sleeve, and the other end extends obliquely towards the central axis and forms an inwardly protruding arc-shaped contact portion.
[0011] As a further improvement to the technical solution disclosed in this utility model, the arc-shaped contact portion is an arc surface structure with a set radius of curvature. When the male contact is inserted into the socket spring sleeve, multiple elastic arms form a wrapping abutment against the male contact from different radial directions.
[0012] As a further improvement to the technical solution disclosed in this utility model, the interval between adjacent arc-shaped contact parts is no greater than 0.2 mm, and the curvature center of the arc-shaped contact parts coincides with the central axis of the socket spring sleeve.
[0013] As a further improvement to the technical solution disclosed in this utility model, the second elastic contact portion is composed of multiple simply supported contact beams distributed circumferentially along the central axis of the insertion spring sleeve. The simply supported contact beams are formed by punching the circumferential sidewall of the insertion spring sleeve inward to form an arched contact portion, and their two ends are rigidly connected to the circumferential sidewall of the insertion spring sleeve.
[0014] As a further improvement to the technical solution disclosed in this utility model, when the male contact is inserted, the arched contact portion first forms a line contact with the male contact; as it is inserted into place, the arched contact portion is squeezed and produces a slight deformation, and the line contact area expands to both sides to form a line-surface combined contact state.
[0015] As a further improvement to the technical solution disclosed in this utility model, the axial spacing between the arc-shaped contact portion and the arched contact portion is controlled at 1.2 to 3 mm, and they are staggered along the circumferential direction. A first interval angle is formed between the centerlines of adjacent elastic arms, and a second interval angle is formed between the centerlines of adjacent simply supported contact beams. The distribution phases of the first interval angle and the second interval angle are circumferentially offset by 30° to 60°.
[0016] As a further improvement to the technical solution disclosed in this utility model, the inner diameter of the arc-shaped contact part is D1, and the inner diameter of the apex of the arched contact part is D2, and the two satisfy the following relationship:
[0017] D2 = D1 - (0.15 ± 0.03) mm.
[0018] In addition, this utility model also discloses a fixed-end electrical connector, including a fixed-end body, a fixed-end gland, a wire, and the aforementioned multi-area contact female component. The fixed-end gland is integrated with the fixed-end body and cooperates to restrict the axial displacement freedom of the multi-area contact female component. The fixed-end body has an axially penetrating mounting cavity for accommodating the multi-area contact female component. The tail end of the sleeve has a terminal for electrical connection with the wire.
[0019] As a further improvement to the technical solution disclosed in this utility model, at least two elastic hooks are formed on the side of the fixed end cap facing the fixed end body component. The fixed end body component is formed with limiting holes adapted to the elastic hooks. The elastic hooks and the limiting holes engage to achieve the connection between the fixed end cap and the fixed end body component.
[0020] Regarding the subject of multi-area contact components, its practical application can achieve at least the following beneficial technical effects, specifically:
[0021] 1) During the insertion of the male contact, the first elastic contact part deforms first and achieves initial stable contact through surface contact, laying the foundation for subsequent mating; the second elastic contact part then deforms and supplements the contact through line-surface contact. The two form a spatially staggered distribution, which can effectively offset the adverse effects caused by the male contact part's skewness and jump, avoid the problem of local detachment caused by the concentration of contact points in a single contact structure, and greatly reduce the risk of poor contact.
[0022] 2) The combination design of surface contact and line-surface contact can ensure sufficient conductive area to accommodate large current transmission through surface contact, and improve the adaptability to the dimensional tolerance of male contact by taking advantage of the elastic adjustment capability of line-surface contact, thus taking into account both conductivity and fit tolerance.
[0023] 3) The design of the first elastic contact portion deforming before the second elastic contact portion allows for the gradual release of radial force during insertion and extraction, reducing local stress concentration and delaying elastic fatigue. Furthermore, the axially staggered distribution enables the first and second elastic contact portions to form complementary support under stress, reducing the load-bearing pressure under single-contact conditions and extending the overall service life. Its performance is particularly outstanding under complex conditions such as vibration and impact, ensuring a continuous and stable electrical connection through continuous contact across multiple areas, meeting the requirements of high-reliability applications.
[0024] Regarding the fixed-end electrical connector, the mounting cavity of the fixed-end body provides precise positioning space for the female contact. In addition, the axial displacement of the female contact can be strictly limited by the coordinated constraint of the fixed-end gland and the fixed-end body, avoiding contact position displacement caused by insertion and extraction force or external impact, thus ensuring the stability of electrical conduction from a structural perspective. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a three-dimensional schematic diagram of the straight-head fixed-end electrical connector disclosed in this utility model.
[0027] Figure 2 This is an exploded view of the straight-head fixed-end electrical connector disclosed in this utility model.
[0028] Figure 3 This is a three-dimensional schematic diagram of the female contact component in the straight-head fixed-end electrical connector disclosed in this utility model.
[0029] Figure 4 This is an exploded view of the female contact in the straight-head fixed-end electrical connector disclosed in this utility model.
[0030] Figure 5 This is a three-dimensional schematic diagram of the sleeve in the female contact component disclosed in this utility model.
[0031] Figure 6 This is a three-dimensional schematic diagram of the insertion spring sleeve in the female contact component disclosed in this utility model.
[0032] Figure 7 yes Figure 6 A magnified view of part of I.
[0033] Figure 8 This is a three-dimensional schematic diagram of the fixed end body component in the straight-head fixed-end electrical connector disclosed in this utility model.
[0034] Figure 9 This is a three-dimensional schematic diagram of the fixed end cover in the straight-head fixed-end electrical connector disclosed in this utility model.
[0035] Figure 10 yes Figure 1 Top view.
[0036] Figure 11 yes Figure 10AA sectional view.
[0037] Figure 12 This is a three-dimensional schematic diagram of the elbow-type fixed-end electrical connector disclosed in this utility model.
[0038] Figure 13 This is an exploded view of the elbow-type fixed-end electrical connector disclosed in this utility model.
[0039] 1-Fixed end body component; 11-Mounting cavity; 12-Limiting locking hole; 2-Fixed end cap; 21-Elastic hook; 3-Wire; 4-Female contact component; 41-Sleeve; 411-Receiving countersunk hole; 412-Connecting pin; 42-Socket spring sleeve; 421-First elastic contact part; 4211-Elastic arm; 42111-Arc-shaped contact part; 422-Second elastic contact part; 4221-Simply supported contact beam; 42211-Arch-shaped contact part. Detailed Implementation
[0040] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 , Figure 2 The diagrams show a perspective view and an exploded view of the straight-end fixed-end electrical connector disclosed in this utility model. It can be seen that it mainly consists of a fixed-end body 1, a fixed-end cover 2, a wire 3, and a female contact 4. The fixed-end body 1 has an overall axially extending cylindrical structure, with an axially extending mounting cavity 11 inside to accommodate the female contact 4, thus radially limiting the female contact 4 and ensuring its stable position during operation. The fixed-end cover 2 has a cover-like structure, and its shape matches the end of the fixed-end body 1. When the fixed-end cover 2 and the fixed-end body 1 are assembled, they form a cooperative constraint in the axial direction, effectively restricting the axial displacement freedom of the female contact 4 within the mounting cavity 11. One end of the wire 3 is directly electrically connected to the female contact 4, while the other end extends to the external circuit, serving as a current transmission path.
[0041] As described above, the female contact 4, as the core component for achieving circuit conduction, plays a role in establishing a stable electrical connection between the fixed-end electrical connector 1 and the board-end connector. For example... Figure 3 , Figure 4 As shown, the female contact 4 is composed of a sleeve 41 and a socket spring sleeve 42, and the sleeve 41 is used to constrain the radial expansion freedom of the socket spring sleeve 42. Figure 5As shown, the end of the sleeve 41 is formed with a countersunk hole 411 for inserting the spring sleeve 42, and its tail is provided with a terminal 412 for electrical connection with the wire 33. The connection part between the terminal 412 and the wire 33 is provided with a matching crimping groove or welding surface, and a rigid connection with the conductor of the wire 33 is achieved by mechanical crimping or high-temperature welding, ensuring that there is no loose gap between the two, so as to both transmit current and withstand the axial tensile force of the wire 33.
[0042] Depend on Figure 5 As can be clearly seen in the diagram, the outer wall of the sleeve 41 is also provided with a limiting structure (positioning protrusion or step structure) that matches the mounting cavity 11, and the bottom of the receiving countersunk hole 411 is provided with a positioning structure, which can limit the insertion depth of the socket spring sleeve 42 and ensure the relative positional accuracy of the two after assembly. When the sleeve 41 is installed into the mounting cavity 11 together with the socket spring sleeve 42, it can form an axial limit with the inner wall of the mounting cavity 11 by means of the limiting structure, and with the constraint of the fixed end cover 2, it ensures that the axial position of the entire female contact 4 inside the fixed end electrical connector is accurate and stable.
[0043] like Figure 6 As shown, the insertion spring sleeve 42 has an overall axially extending cylindrical structure, and its outer wall is adapted to accommodate the countersunk hole 411. When the insertion spring sleeve 42 is inserted into the countersunk hole 411, the cylindrical wall of the sleeve 41 can limit the excessive expansion of the insertion spring sleeve 42 in the radial direction, ensuring that its elastic contact portion always maintains a suitable abutting force. The insertion spring sleeve 42 is integrally formed with a first elastic contact portion 421 and a second elastic contact portion 422 that are axially staggered. During the insertion process of the male contact, the first elastic contact portion 421 undergoes radial elastic deformation before the second elastic contact portion 422, and the first elastic contact portion 421 abuts against the male contact through surface contact, while the second elastic contact portion 422 abuts against the male contact through line-surface contact.
[0044] like Figure 6 As shown, the first elastic contact portion 421 is composed of a plurality of elastic arms 4211 circumferentially distributed along the central axis of the insertion spring sleeve 42. One end of the elastic arm 4211 is integrally connected to the circumferential sidewall of the insertion spring sleeve 42, and the other end extends obliquely towards the central axis and forms an inwardly protruding arc-shaped contact portion 42111 (e.g., Figure 7 (As shown in the diagram). During the insertion of the male contact, the first elastic contact portion 421 deforms first, and the arc-shaped contact portion 42111 contacts the outer wall of the male contact and generates radial elastic deformation. This surface contact achieves initial stable contact, laying the foundation for subsequent mating. The surface contact method relies on the large contact area of the arc-shaped contact portion 42111 to establish a stable electrical connection in the initial stage, laying the foundation for subsequent current transmission. Simultaneously, it guides the insertion direction of the male contact, ensuring a smooth insertion process.
[0045] Similarly, Figure 6 As shown, the second elastic contact portion 422 is composed of a plurality of simply supported contact beams 4221 circumferentially distributed along the central axis of the insertion spring sleeve 42. The simply supported contact beams 4221 are formed by inwardly pressing the circumferential sidewalls of the insertion spring sleeve 42 to form an arched contact portion 42211 (e.g., ...). Figure 7 As shown in the diagram, its two ends are rigidly connected to the circumferential sidewalls of the insertion spring sleeve 42. The second elastic contact portion 422 then deforms. As the male contact continues to be inserted and passes through the elastic arm 4211, the arched contact portion 42211 first forms a line contact with the male contact. As it is inserted into place, the arched contact portion 42211 is compressed and undergoes a slight deformation. The line contact area expands to both sides to form a line-surface bonding contact state.
[0046] The first elastic contact portion 421 and the second elastic contact portion 422 are spatially misaligned, which can effectively offset the adverse effects caused by the male contact component's skewing and jumping, avoid the problem of local detachment caused by the concentration of contact points in a single contact structure, and greatly reduce the risk of poor contact.
[0047] The combined design of surface contact and line-surface contact ensures sufficient conductive area for high current transmission through surface contact, while leveraging the elastic adjustment capability of line-surface contact to improve adaptability to the dimensional tolerances of the male contact, thus balancing conductivity and tolerance for misfitting. In the line-surface contact method, the line contact portion of the arched contact part 42211 provides greater contact pressure to ensure reliable connection, while the surface contact portion of the arc-shaped contact part 42111 helps increase the conductive area, further improving the current transmission effect.
[0048] It is also important to emphasize that the design of the first elastic contact 421 deforming before the second elastic contact 422 allows the radial force to be gradually released during insertion and removal, reducing local stress concentration and delaying elastic fatigue. Furthermore, the axial misalignment distribution allows the first and second elastic contact 421 and 422 to form complementary support under stress, reducing the load-bearing pressure under single-contact conditions. Due to the structural differences between the elastic arm 4211 and the simply supported contact beam 4221, resulting in different contact methods and deformation sequences, they form a multi-dimensional, multi-layered contact system. This not only effectively disperses the force generated during male contact insertion, preventing damage to a single contact due to excessive force, but also accommodates minor misalignments that may occur in the male contact, ensuring a stable contact point and extending overall service life. Its performance is particularly outstanding under complex conditions such as vibration and impact, ensuring a continuous and stable electrical connection through continuous contact in multiple areas, meeting the requirements of high-reliability applications.
[0049] Depend on Figure 7As clearly shown, the arc-shaped contact portion 42111 is an arc-shaped surface structure with a set radius of curvature. The radius of curvature matches the outer wall curvature of the male contact, enabling a highly conformable surface contact during contact. When the male contact is inserted into the socket spring sleeve 42, multiple elastic arms 4211, evenly distributed circumferentially, simultaneously contact the male contact, with their arc-shaped contact portions 42111 forming a wrapping abutment against the male contact from different radial directions.
[0050] Furthermore, as a further optimization of the above technical solution, the interval between adjacent arc-shaped contact portions 42111 is no greater than 0.2 mm, and the curvature center of each arc-shaped contact portion 42111 coincides with the central axis of the insertion spring sleeve 42. In this way, the closely arranged arc-shaped contact portions 42111 can form a nearly continuous circumferential contact ring when the male contact is inserted. Even if there is slight radial runout in the male contact, the gap can be compensated by the cooperative contact of adjacent arc-shaped contact portions 42111, ensuring the continuity of contact.
[0051] like Figure 6 , Figure 7 As shown, the axial spacing between the arc-shaped contact portion and the arch-shaped contact portion is controlled at 1.2–3 mm, and they are staggered along the circumferential direction. A first interval angle is formed between the centerlines of adjacent elastic arms, and a second interval angle is formed between the centerlines of adjacent simply supported contact beams. The distribution phases of the first interval angle and the second interval angle are staggered by 30°–60° in the circumferential direction.
[0052] like Figure 6 , Figure 7 As shown, the arc-shaped contact portion 42111 and the arched contact portion 42211 have different heights in the axial direction, and the spacing value should preferably be controlled between 1.2 and 3 mm. This ensures a stepped contact effect during the insertion of the male contact, allowing the radial force to be released in stages. Furthermore, the arc-shaped contact portion 42111 and the arched contact portion 42211 are staggered circumferentially, and the phase offset design of the first and second interval angles at 30° to 60° circumferentially further optimizes the spatial distribution of the contact points. During the insertion and operation of the male contact, this structure can better adapt to complex working conditions such as vibration and impact. Even if a certain contact portion experiences temporary contact instability due to external force, other contact portions can promptly fill the gap, ensuring a continuous and reliable electrical connection.
[0053] Specifically, a first interval angle is formed between the centerlines of adjacent elastic arms 4211, and a second interval angle is formed between the centerlines of adjacent simply supported contact beams 4221. The distribution phases of the first and second interval angles are circumferentially offset by 30° to 60°. The arc-shaped contact portion 42111 and the arched contact portion 42211 form a complementary layout in the circumferential direction, preventing contact points from concentrating in a single radial direction and making the radial resistance force on the male contact more uniform. Furthermore, when the male contact experiences a slight misalignment, the staggered contact portions can provide support from different directions, effectively counteracting the adverse effects of the misalignment.
[0054] As a further optimization of the above technical solution, the inner diameter of the arc-shaped contact portion 42111 is D1, and the inner diameter of the apex of the arch-shaped contact portion 42211 is D2, strictly following the dimensional relationship D2 = D1 - (0.15 ± 0.03) mm. Since the inner diameter of the apex of the arch-shaped contact portion 42211 is slightly smaller than the inner diameter of the arc-shaped contact portion 42111, when the male contact is inserted, it will first contact the arc-shaped contact portion 42111 with the slightly larger inner diameter and cause it to deform. Only after the male contact continues to penetrate to the corresponding position will it contact the apex of the arch-shaped contact portion 42211 with the smaller inner diameter, thus strictly ensuring the progressive contact logic that the first elastic contact portion 421 deforms before the second elastic contact portion 422.
[0055] Furthermore, during the performance demonstration phase of the sample trial production, the difference range of 0.15±0.03mm was repeatedly verified. This ensures that there is a reasonable interval between the contact timing of the arc-shaped contact part 42111 and the arch-shaped contact part 42211, avoiding the synchronization of contact actions due to excessively small size difference, and also prevents the contact pressure of the arch-shaped contact part 42211 from increasing suddenly due to excessively large difference.
[0056] As Figure 10 , Figure 11 As shown, the fixed end body 1 and the fixed end cap 2 are quickly assembled using a snap-fit method to form a stable overall structure. Figure 8 , Figure 9 As shown, the fixed end cap 2, facing the fixed end body 1, has three circumferentially evenly distributed elastic hooks 21 integrally formed. The elastic hooks 21 extend at an angle and have outwardly protruding locking portions at their ends, possessing a certain radial elastic deformation capability. Correspondingly, the side wall of the fixed end body 1 has limiting holes 12 that correspond one-to-one in number and position to the elastic hooks 21. When the fixed end cap 2 is assembled with the fixed end body 1, the elastic hooks 21 undergo radial contraction deformation during insertion due to the pressure from the side wall of the fixed end body 1. When their locking portions reach the position of the limiting holes 12, the elastic hooks 21 automatically spring back, embedding their locking portions into the limiting holes 12 to form a secure locking fit, thereby achieving rapid engagement between the two.
[0057] Figure 12 , Figure 13 The diagrams show a perspective view and an exploded view of the elbow-type fixed-end electrical connector disclosed in this utility model. It can be seen that, compared to a straight-end fixed-end connector, the elbow-type fixed-end body has an overall L-shaped bend, and its internal mounting cavity also extends in a bend to adapt to different installation spaces and wiring directions. The elbow-type fixed-end body is also assembled with the elbow-type fixed-end cover via a snap-fit mechanism, working together to provide axial and radial restraint for the female contact.
[0058] It is worth noting that the female contact 4 is suitable not only for straight-end fixed-end electrical connectors but also for bent-end fixed-end electrical connectors. It can play a stable core role in both design forms. It achieves reliable electrical connection through multi-area contact with the male contact, ensuring that the circuit conduction function is met regardless of whether the connector is straight or bent.
[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A multi-area contact female component, comprising a sleeve and a spring sleeve for insertion, wherein the sleeve is used to constrain the radial expansion degree of freedom of the spring sleeve, characterized in that, The socket spring sleeve has an overall cylindrical structure and is integrally formed with a first elastic contact portion and a second elastic contact portion that are staggered along the axial direction. During the insertion process of the male contact, the first elastic contact portion undergoes radial elastic deformation before the second elastic contact portion. The first elastic contact portion abuts against the male contact through a surface contact, while the second elastic contact portion abuts against the male contact through a line-surface contact.
2. The multi-area abutment female contact element according to claim 1, characterized in that, The first elastic contact portion is composed of a plurality of elastic arms that are circumferentially distributed along the central axis of the socket spring sleeve; one end of the elastic arm is integrally connected to the circumferential sidewall of the socket spring sleeve, and the other end extends obliquely toward the central axis and forms an inwardly protruding arc-shaped contact portion.
3. The multi-area abutment female contact element according to claim 2, characterized in that, The arc-shaped contact portion is an arc surface structure with a set radius of curvature; when the male contact is inserted into the socket spring sleeve, the multiple elastic arms form a wrapping abutment against the male contact from different radial directions.
4. The multi-area abutment female contact element according to claim 3, characterized in that, The interval between adjacent arc-shaped contact portions is no greater than 0.2 mm, and the curvature center of each arc-shaped contact portion coincides with the central axis of the socket spring sleeve.
5. The multi-area abutment female contact element according to claim 2, characterized in that, The second elastic contact portion is composed of a plurality of simply supported contact beams distributed circumferentially along the central axis of the insertion spring sleeve; the simply supported contact beams are formed by punching the circumferential sidewall of the insertion spring sleeve inward to form an arched contact portion, and their two ends are rigidly connected to the circumferential sidewall of the insertion spring sleeve.
6. The multi-regional contactor according to claim 5, characterized in that, When the male contact is inserted, the arched contact portion first forms a line contact with the male contact; as it is inserted into place, the arched contact portion is compressed and undergoes a slight deformation, and the line contact area expands to both sides to form a line-surface combined contact state.
7. The multi-regional contactor according to claim 5, characterized in that, The axial spacing between the arc-shaped contact portion and the arch-shaped contact portion is controlled at 1.2 to 3 mm, and they are staggered along the circumference. A first interval angle is formed between the centerlines of adjacent elastic arms, and a second interval angle is formed between the centerlines of adjacent simply supported contact beams. The distribution phases of the first interval angle and the second interval angle are staggered by 30° to 60° in the circumference.
8. The multi-area abutment female contact element according to claim 7, characterized in that, The inner diameter of the arc-shaped contact part is D1, and the inner diameter of the apex of the arched contact part is D2. The two satisfy the following relationship: D2=D1-(0.15±0.03)mm.
9. A fixed-terminal electrical connector, characterized in that, The device includes a fixed end body, a fixed end cap, a wire, and a multi-area contactor as described in any one of claims 1-8; the fixed end cap is integrated with the fixed end body and cooperates to restrict the axial displacement freedom of the multi-area contactor; the fixed end body has an axially penetrating mounting cavity for inserting the multi-area contactor; the tail of the sleeve has a terminal for electrical conduction with the wire.
10. The fixed-end electrical connector according to claim 9, characterized in that, The fixed end cap has at least two elastic hooks formed on the side facing the fixed end body; the fixed end body has a limiting hole adapted to the elastic hooks; the elastic hooks engage with the limiting hole to achieve the connection between the fixed end cap and the fixed end body.